“SOLAR REFRIGERATION SYSYTEM USING PELTIER MODULES”

Abstract: Traditional vapor compression refrigeration systems account for approximately 15% of global electrical energy demand and rely on refrigerants that contribute significantly to ozone depletion and global warming [1], [2]. This research investigates the design and performance of a sustainable alternative: a solar-powered thermoelectric refrigerator utilizing the Peltier effect. The system integrates 12V DC thermoelectric modules with a photovoltaic array and battery storage, eliminating the need for moving parts or chemical refrigerants [3], [4]. Experimental results demonstrate that optimized systems can achieve a Coefficient of Performance as high as 3.74 at a current of 1.4A when the cold side temperature reaches 0°C [5]. Performance tests on a 2.6-liter cooling chamber showed a rapid temperature reduction from an ambient 22.48°C to 15.15°C within 136 seconds [3]. Furthermore, the integration of dual-axis solar tracking can enhance the COP by 44% to 75% compared to fixed-panel systems [6]. The results highlight that while thermoelectric coolers typically have lower COPs than conventional systems, they offer a 44–63% reduction in power consumption for small-scale applications and a potential lifespan of up to 40 years [3], [7]. These characteristics make solar-powered Peltier refrigeration an ideal solution for portable medical storage and food preservation in remote, off-grid, and humanitarian contexts [8], [9].

Keywords: Peltier Effect, Thermoelectric Cooling, Solar Photovoltaic, Coefficient of Performance, Sustainable Refrigeration, Portable Cooling, Renewable Energy, Heat Dissipation